Process of making multiply waterproof sheets



1,616901l Fb 8" 1927' 1 KlRscHBRAuN PROCESS 0F MAKING MULTIPLY WATERPROOF SHEETS Filed Aug. 16. 1922 Patented Feb. s, 1927.

UNITED STATES LESTER KIRSCHBRAUN, .OF CHICAGO, ILLINOIS. i

V'PATENT OFFICE..

PROCESS OF MAKIG MULTIPLY WATERPROOF SHEETS.

Appiication sled August 1e, 1922. serial No. 582,303.

The present invention is more particularly directed to the `manufacture of a multiply -sheet in which a relatively thin film of "desired, sufficiently thinned with. water so that it w ill readily flow and can be applied as a thin film. By means of the present invention, the waterproofing material is so applied as to avoid any waste. Also the process is socarried outthat the bituminous or pitchy emulsion does not come in contact with any ofthe screens or blankets,'or any other operating parts of the'machine. This permits of the use of an emulsion which 1s not n'early as non-adhesive as is .the case where the emulsionis mixed with the paper stock and formed on themoulds and thereby permits of av much wider range in charl acter of emulsions suitable for use inthis connection. In order to more clearly-understand-the invention I show the accompanying drawing in which the single figure is a more or les's diagrammatic view of an apparatus suitable for carrying out theprocess.

Referring to the drawings 1, 2, 3 and '4 'designate vats in which are mounted the usual cylinder moulds 5, 6, 7 and 8 on which respectlve plies are built up. The vats are rovided with the usual couch rolls 9 and lanket 10. Between any of the v ats may he interposedan emulsion distributing vat. In

the present instance the vat is shown only' as between the vats 2 and 3, but it may also be interposed b lvats 1 and 2 and tanks 3 and 4 if desire Also there may be 6 and 8 cylinder moulds with distributing vats betweenseach pair of moulds* if desired.

In the present instance I only show one distributing vat,v 11 in which is vmounted applying mould or roll 12, and above which is mounted a depressible yieldablyv mountedf presser roll 13, which acts as a couoh roll. This roll 13 is so mounted as to 1n effect act as a couch roll and prevent the pickmg off of the film from'the blanket by the disvtime it is applied.

tributing mould. Likewise it adjusts the degree of contact between the wet film of paper and the distributing mould in such a manner that the freshly formed fibrous film on the blanket is not disturbed 4or mutilated. The roll 12 may be either a solid metal or wooden roll, or preferably it may be covered with a wire mesh or suitable fabric for picklng up the desired quantity of emulsion.

In carrying out the process in the manner particularly illustratedin the drawings, the fibrous plies are formed respectively on the' rolls 5, 6, 7 and 8 and as the previously formed plies pass between the rolls 12 and 13, a relatively thin film of the emulsion is applied to the under-face of the llower ply cordingly be removed from the emulsion which will be broken and the asphalt film coalesce and forma continuous waterproof medium between thefplies in question.

y If desired, more or less fibrous stock may bev mixed with the emulsion before it is' lplaced in the distributing tank'11,'which ts'as a reinforcement lfor the bituminous I claim as my invention: 1. A process for making' a waterproofed multiply sheet which consits in uniting a pluralityl of wet fibrous plies and simultaneously wththe formation of the plies interposing by a "rolling action a continuous waterproofing film between a plurality of plies, said waterproofing film being in the form of an emulsion miscible'in wafer at the 2. A process for making a waterproofed multiply sheet which consists in uniting a plurality of wet fibrous plies andv simultaneously with the formation of the plies interposing by a rolling action a continuous 105 waterproofing film between a plurality 'of plies, said waterproofing lm being in the form of an emulsion miscible in water 'at -the time it is applied, comprising essentially a bituminous like binder and an emulsifying 110 sheet WhichKcomprises forming a wet brous ,the form of an emulsion miscible in Water,`

and transferring said emulsion as a preformed continuous lm to said Wet web.

between the Webs.

4. A method of producing a Waterproofed sheet which comprises forming a wet fibrous web; in bringing said wet fibrous Web into contact with a. moving surface carrying an aqueous film of Waterproofing material in the form of an emulsion miscible in Water,

transferring said emulsion as a preformed continuous film to said Wet web, and in then uniting a second wet fibrous Web thereto whereby said continuous lm is" interposed 5. A method of producing a Waterproo'fed sheet which comprises formlng a wet Afibrous web, in transferring to the underside of the Wet fibrous web an aqueous' bituminous emulsion, as a preformed film.

6. A recess vof producing a .waterproofed sheet w iich comprises formin a wet fibrous` web2 in transferring to the un erside of ,said Wet fibrous web an aqueous bituminous film of Waterproofing material by a rollin con- 4tacting action,`and in thereafter uniting a second fibrous web with the underside of said first mentioned web whereby said film is interposed between the Webs.

7. A process for making a Waterproofed multiply sheet which consists in uniting a plurality pf Wet fibrous plies and Simultaneouslywith the formation of the plies interposing by a rolling action a continuous waterproofing film between a pluralityv of lies, said Waterproofing film being in the orm of an emulsion miscible in Water at the time it is applied, and dryingvthe sheet thus formed to simultaneously remove the water and cause the Waterproofing materiald to fuse.

LESTER Kisser-iBRAUN.I 

